<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Vue中多个元素或组件的过渡</title>
    <script src="./vue.js"></script>
    <style>
        .v-enter,.v-leave-to {
            opacity: 0;
        }
        .v-enter-active, .v-leave-active {
            transition: opacity 1s;
        }
    </style>
</head>
<body>

    <div id="root">
        
        <transition mode="out-in">
            <div v-if="show" key="hello">hello world</div>
            <div v-else key="bye">Bye World</div>
        </transition>
        <button @click="handleClick">toggle</button>

        <transition mode="out-in" >
            <component :is="type"></component>
        </transition>
        <button @click="handleClick1">toggle</button>
    </div>

    <script>
        Vue.component('child',{
            template: `<div>child</div>`
        })

        Vue.component('child-one',{
            template: `<div>child-one</div>`
        })
        var vm = new Vue({
            el: "#root",
            data: {
                show: true,
                type: 'child'
            },
            methods: {
                handleClick () {
                    this.show = !this.show 
                },
                handleClick1 () {
                    this.type = this.type === 'child' ? 'child-one' : 'child'
                }
            }
        })
    </script>
</body>
</html>